Overview
The OPA561, produced by Texas Instruments, is a high-current, high-speed operational amplifier designed for demanding applications. This monolithic integrated circuit is capable of driving up to 1.2-A pulses into reactive loads, making it suitable for various high-power and high-reliability applications. The OPA561 operates from either a single supply in the range of 7 V to 15 V or dual power supplies of ±3.5 V to ±7.5 V, offering design flexibility. It features a high slew rate of 50 V/µs, a gain-bandwidth product of 17 MHz, and a full-power bandwidth of 1 MHz, ensuring excellent linearity and performance. The amplifier is internally protected against overtemperature conditions and current overloads, and it includes an adjustable current limit feature for user-defined current control.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range (Single Supply) | 7 V to 15 V | V |
| Supply Voltage Range (Dual Supply) | ±3.5 V to ±7.5 V | V |
| Output Current (Maximum Continuous) | 1.2 A | A |
| Output Voltage Swing | 12 VPP (with nominal 15-V supply) | VPP |
| Gain-Bandwidth Product | 17 MHz | MHz |
| Slew Rate | 50 V/µs | V/µs |
| Full-Power Bandwidth | 1 MHz | MHz |
| Temperature Range | 0°C to 125°C | °C |
| Package Type | HTSSOP-20 PowerPAD | |
| Output Impedance | 0.05 Ω (at f = 100 kHz) | Ω |
| Current Limit Range | ±0.2 A to ±1.2 A | A |
Key Features
- High-Current Capability: Drives up to 1.2-A pulses into reactive loads.
- Adjustable Current Limit: User-defined current limit from 0.2 A to 1.2 A.
- Thermal Protection: Internally protected against overtemperature conditions.
- Output Disable Control: Enable and status pin for output disable and thermal shutdown monitoring.
- High Slew Rate and Bandwidth: 50 V/µs slew rate and 17 MHz gain-bandwidth product.
- Thermally Enhanced Package: HTSSOP-20 PowerPAD package for low thermal resistance.
- Wide Power Range: Operates from single or dual power supplies.
Applications
- Power-Line Communications: Suitable for high-reliability line-carrier communications.
- Valve-Actuator Drivers: Drives high-current loads in valve-actuator applications.
- Power Supplies: Used in high-current power supply designs.
- Test Equipment: Employed in various test and measurement equipment.
- Laser Diode Drivers: Drives laser diodes with high accuracy and reliability.
- Motor Control: Used in motor control applications requiring high current and precision.
Q & A
- What is the maximum output current of the OPA561?
The OPA561 can drive up to 1.2-A pulses into reactive loads.
- What are the supply voltage ranges for the OPA561?
The OPA561 operates from either a single supply in the range of 7 V to 15 V or dual power supplies of ±3.5 V to ±7.5 V.
- How is the current limit adjusted on the OPA561?
The current limit can be adjusted from 0.2 A to 1.2 A by controlling the input to the ILIM pin using a low-power resistor or potentiometer.
- What is the slew rate of the OPA561?
The slew rate of the OPA561 is 50 V/µs.
- What is the gain-bandwidth product of the OPA561?
The gain-bandwidth product of the OPA561 is 17 MHz.
- What type of package does the OPA561 use?
The OPA561 is available in a thermally enhanced HTSSOP-20 PowerPAD package.
- How does the thermal protection work on the OPA561?
The OPA561 is internally protected against overtemperature conditions, and it includes a thermal shutdown feature to prevent overheating.
- Can the OPA561 be used in single-supply and dual-supply configurations?
- What are some common applications of the OPA561?
The OPA561 is used in power-line communications, valve-actuator drivers, power supplies, test equipment, laser diode drivers, and motor control applications.
- How is the output disabled on the OPA561?
The output can be disabled by forcing the enable and status (E/S) pin low.
